Drier.



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Patented Iuy 25, |899.

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(Application led Nov. 3, 189B.)

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1 ff @I 4 1R @V/w no. 629,3'4f Patented my 25,1399. A. a. mums a c. H. mouwen..

DRIER.

(Application @led Nov. S, 1898.)

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nl. s29,3a4. l Patented July 25, |899.

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DBIER.

.(,pplcation filed Nov. 3, 1898.

3 Sheets-Sheet 3.

(llo Model.)

` UNITED SrATEs .PATENT OFFICE.

ALBERT G. MANNS ND CHARLES H. MCDCWELL, OF CHICAGO, ILLINOIS.

DRIER.

'SPECIFICATON forming part of Letters Patent No. 629,384, dated July 25, 1899. Appiiooaon fnoa Novomoor 3,1898. serai No. 595,396. (No moaoi.)

.To a/Z whom, it rncty concern:

Be it known that we, ALBERT G. MANNS and CHARLES H. MoDowELL, citizens of the United States, residing at Chicago, Illinois,- have invented certain new and useful Irn-` provements in Driers, of which the following is a specification.

The object of our invention is to make an apparatus inwhich the animal refuse oroal from packing and slaughtering houses can be dried, so that it can be converted into fertilizing material; and our invention consists in` the features and details of constructionV hereinafter described and claimed. l In the drawings, Figure l represents a side elevation of our improved drier. Fig. 2 repf resents a front elevation of the upper cylin- Vss der. Fig. 3 is a sectional velevation in the line 3 of Fig. 2. Fig. 4 is a front 'elevation of the lower cylinder. Fig. 5 is a sectional elevationv taken in the line 5 of Fig. 4.. Fig. 6 is a front sectional view taken on line 6 of Fig. 1, and Fig. 7 is a rear sectional elevation taken in line 7 of Fig. l. y

In making our improved apparatus for drying the animal refuse or offal of slaughter and packing houses we make two cylinders A and A', arranged in different vertical planes, as illustrated in Fig. l. These cylinders are supportedv on suitable floors or framework, as shown in the drawings, andthey are preferably housed or inclosed'and are arranged at an oppositely-directed--angle or pitch.' The upper cylinder inclines from the front tothe rear'end, while the lower cylinder inclines frompthe-rear to the fronti end. In order to "facilitate the rotation ofthe cylinders,

foundation and properly braced to hold them seourelyin position. These'supports sustain or carry the heads B2 and BS ofthe cylinders andihold them in a stationary'or non-rotative to which power lwillfpick up and carryquantities of the per C for the introd notion of the material to be dried, while in the lower head is arranged a .which maintains the iire. in the furnace and drives the heated air and gases throughrthe pipes C4 and C5 into the cylinders A and'A', respectively. The amount of air passing through these pipes may be'regulated b j dampers and the tempera-ture of the air and gases passing throughthe pipe C5 may be regulated by the admission of atmospheric air throughthe branch pipe c, so that the. air admittedzinto the lower cylinder may be greatly reduced in temperature, as Will be required by the nature of the work which it is to do. The cylinders are provided with lon- Ipositiou. Inthe upperheadisarrangedahoprespectively. The hot air for these 6o gitudinal flights, shelves, or brackets D, D,

and D2. (Clearly illustratedin Figs. and'.) These shelves or flights ar'e made in three different ways, or, ratheigofthree different forms. The digli ts or shelves D are made with abaseflange to attach it in place and a portion exitending out into the cylinder at substantially right angles to the inner surface of the cylinder. The shelves or flights D are made' with a base-flange to attach it in placeand a portion extending out into the cylinder at substantially an angle of forty-five degreesv tojthe inner surfaceY of the cylinder. The shelves or flights D2 are made. with a baseydange to attach it in place anda Aportionex- Atending out into the cylinder at substantially right angles to the inner surface of the cylinder and a portion turned up at substantially right angles thereto. vThese various forms of iiights or lledges from an examination of the drawings.' They are made inthese diderent fornisso that they material being treated and retain the same uutil they have passedY to diiferent positions in roo their revolution. Thus the iiightD will carry the material farther around thanthe fiight D, and the flight D2 will carry the .material farther than the liight D'. This prevents the will be readily understood material from being discharged back to the bottom of the cylinder at the same place as would be the case if the iiights were all made of the same shape and had the same retaining capacity. Ve are thus enabled to secure a more complete and perfect distribution of the material over the bottom of the cylinder and at the same time sift it down in athinner and more diffused state than if we made the flights all of the same shape. The material discharged from the rear end of the upper cylinder is directed by a chute or hopper E into the rear end of the lower cylinder. Both cylinders are made open at their rear ends,

and fans F and F draw the steam, moisture,

and vapors caused by the heating and drying of the material out into a flue G, which carries them up and discharges them into the atmosphe're. These fans may be rotated through pulleysf and f in any desired way, but preferably by belts connected with suitable power. As the lmaterial is discharged it falls into a trough H, where a screw conveyer h 'is ar ranged to carry it away to a desired place.

In operation the wet animal refuse and offal are discharged into the front end of the upper ofthe revolving cylinders. As it passes in it comes into contact with thel stream or current of heated a'ir and gases entering through the pipe C4. Thus the material to be treated in its condition of greatest moisture is brought directly into contact with the air and gases in their condition of greatest heat.

. The material is caught up by the flights or shelves as the cylinder rotates and dropped back again to the bottom from different positions, so that it is kept spread ordistributed over the'bottom of the cylinder. The inclination of the cylinder causes the material to travel toward the rear end as new material is introduced at the front end. The steam and vapors expelled from the material being treated by the heat of the air and gases are drawn out by the suction of the fan F and t allowed to remain in the cylinder in contact with the material being dried. By the time the material reaches the rear end of the upper cylinder it has had a large portion of the moisture eliminated and removed.V It is then discharged into the chute E, whence it p passes into the re'ar end of the lower cylinder.

Here the same operation of the shelves or flights takes place as already described, so that the material is constantly picked up and distributed in a thinned or diffused condition. A suction-fan F draws off the moisture and vapors caused by the heated air and gasesin the lower cylinder, so that as' the material advances toward the front end it becomes drier and drier until bythe time it reaches the front end it is entirely dry and in the condition desired. As the material becomes freed from moisture it is desirable that the air and gases brought into contact with it should be of less heat or temperature than Where they are brought into contact with the material in its wet and green condition, as

l first presented. The temperature of the air and gases admitted is therefore reduced as much as desired, so that they will be able to complete the drying without burning or iny juring the material.

lVhat we regard as new, and desire to secure by Letters Patent, is-'- l. The combination, in a drier, of an upper rotatable cylinder having` a downward inclination in the direction of its discharge end,

an open discharge end for the cylinder a stationary head at the receiving end of the cylinder around which the cylinder revolves, a hopper forthe material to be dried communicating through the stationary head with the receiving end of the cylinder, means for introducing through the stationary head a hot blast in a condition of highest temperature directly against the material/as it enters the cylinder from the hopper 'when the material is in its condition of greatest greenness and moisture at the receiving end of the cylinder, a lower rotatable cylinder located in line with and having its receiving end at the discharge end of the upper cylinder and havingadownward inclination in the direction ot' its discharge end, an open receiving end for such cylinder, a stationary head at the discharge end of such cylinder around which the cylinder revolves, a chute `leading from the discharge end of the upper cylinder into thereceiving end of the lower cylinder transferring the material from one cylinder to the other, an outlet for the dried material through the stationary head at the discharge end of the lower cylinder, and means for introducing a blast of diminished temperature through the stationary head into the discharge end of the lower cylinder tok pass through such cylinder, substantially as described.

` 2. The combination, in a drier, of an upper rotatable cylinder having a downward inclination inthe direction of its discharge end, an open discharge end for the cylinder astationary head at the receiving end of the cylinder around which the cylinder revolves, a hopper forthe material to be dried communieating through the stationary head with the receiving end of the cylinder, means for introducing a hot blastin the condition of highest temperature directly against the material as it enters the cylinder from the hopper at the receiving end of the cylinder when the material is in its condition of greatest greenness andl moisture, a lower rotatable cylinder in line with and having its receiving end at the discharge end of the upper cylinder and having a downward inclination in the direction of its discharge end, an open receiving end for such cylinder, a stationary head at the discharge end of such cylinder around which the cylinder revolves, a chute leading l fromthe discharge end of the upper cylinder intov the receiving end of the lower cylinder transferring the material from one cylinder to the other, an outlet from the stationary head for the discharge of the dried material los 'at the discharge end of the lower cylinder, means for introducing a blast'of diminished temperature into the discharge end of the lower cylinder, and means for drawing 01T steam, vapor and moisture from the upper cylinder at the open discharge end and from the lower cylinder at the open receiving end, substantially as described.

3. The combination, in a drier, of an upper rotatable cylinder having a downward inclination in the direction of the discharge end, an open discharge end for the cylinder a stationary head at the receiving end of the cylinder around which the cylinder revolves, a hopper for the material to be dried communicating through the stationary head with the receiving end of the cylindeiga hot-air pipe entered into and terminating at the inner line of the head for the receiving end of the cylinder and communicating with a furnace for projecting-a blast of hot airin a condition of highest temperature directlyagainst the material as it is discharged from the hopper when` the material is in its condition of greatest greenness and moisture at the receiving end of the cylinder, a lower rotatable cylinder in line with and havingits receiving end at the discharge end of the upper cylinder and having a downward inclination in the direction of its discharge end, an open receiving end for such cylinder a stationary head at the discharge end of such cylinder around which the cylinder revolves, a chute leading from the discharge end of the upper cylinder into the receiving end of the lower cylinder transferring the material from one cylinder to the other, an outlet through the stationary head at the discharge end of the lower cylinder for the dried material, and a hot-air pipe entering into and terminating at the inner line of the head for the discharge end of the cylinder and communicatingwith a furnace for projecting a blast of diminished temperature into the discharge end of the lower cylinder to complete the drying of the material with the passage of the blast through such cylinder, substantially4 as described.

4. The combination, in a drier, of an upper rotatable cylinder having a downward inclination in the directionof its discharge end, 5o

nicating through the stationary head with the receiving end of the cylinder, a hot-air pipe entered into and terminating at the inner line of the head for the receiving end of the cylinder and communicating' with a furnace for projecting a blast of hot air in a con- 6o dition of highest temperature directly against the material as it is discharged from the hopper at the receiving end of the cylinder when the material is in its condition of greatest greenness and moisture, a suction-fan located in line with the open discharge end of the cylinder for withdrawing steam, vapor and moisture from the cylinder, a lower rotatable cylinder in line with and having its receiving end at the discharge end ofthe upper cyl- 7o inderand having a downward inclination in the direction of its discharge end, an open discharge end for such cylinder a stationary head at the discharge end of such cylinder around which the cylinder revolves, a chute leading from the discharge end ofthe upper cylinder into the open receiving 'end of the lower cylinder transferring the material from one cylinder to the other, an outlet for th dried material through the stationary head 8o at the discharge end of the lower cylinder, a hot-air pipe entered into and terminating at the inner line of the head forI the discharge yend of the cylinder and communicating with a furnace forv projecting a blast of diminished temperature into the discharge end of the lower cylinder to complete the drying ot' the material in such cylinder and a suction-fan located in line with the receiving end of the lower cylinder for withdrawing steam, vapor, 9o

and moisture from such cylinder, substantially as described.

ALBERT e. MANNS. CHARLES n. McDowELL.

Witnesses:

A. R.. URION, T; C. STURNER. 

